Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.6-20160423' into staging

ppc patch queue for 2016-03-23

A single fix for a bug in parameter handling for the spapr PCI host
bridge.

# gpg: Signature made Sat 23 Apr 2016 07:55:29 BST using RSA key ID 20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.6-20160423:
  hw/ppc/spapr: Fix crash when specifying bad parameters to spapr-pci-host-bridge

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>